Type-writer carrier-return.



3. B. B ENNIS.

TYPE WRITER CARRIER RETURN! APPLICATION FILED mus-2o. um.

3 EuHElETS-SHEET l.

J. B. DENNIS.

TYPE WRITER CARRIER RETURN.

APPLICATION FILED AUG.20. 1917.

1,249,91 3. Patented Dec. 11, 1917.

3 SHEETS-SHEET 2.

.17 v a 14 9 J0 OCDOOQGOC) -QOOOG ODGOGQQGO @GGOOOGOC) J. B. DENNIS.

TYPE WRITER CARRIER RETURN.

APPLICATION FILED AUG.20. 1912.

3 SHEETSSHEET 3.

?! llllllllllllllllllllllllfil JOHN B. DENNIS, 0F OTTUMWA, IOWA.

TYPE-WRITER CARRIER-RETURN.

7 Application filed August 20, 1917.

To all whom it may concern:

Be it known that 1, JOHN B. DENNIS, a citizen of the United States, residing at ()ttumwa, in the county of VVapello and State of Iowa, have invented certain new and useful Improvements in Type-lVriter Carrier-Returns; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to new and useful improvements in apparatus for returning carriages of typewrlters and consists of a simple and efiicient attachment to typewriters having various details of construction,

combinations and arrangements of parts which will be hereinafter fully described, shown in the accompanying drawings and then specifically defined in the appended claims.

My invention is illustrated in the accompanying drawings in which:

Figure 1 is an end view of a typewriter showing the application of my invention thereto.

Fig. 2 is a top plan view of a portion of a typewriter showing my attachment applied thereto.

Fig. 8 is sectional view vertically through the boxing containing operative parts of the device, and

Fig. 4 is a sectional view on hne 4-1 of Fig. 3.

Reference now being had to the details of the drawings by numerals:

1 designates the frame of a typewriter of usual construction, and 2 the carriage which is actuated by the usual escapement .mechanism in its step by step movements to the left, it being the purpose of the present invention to return the carriage to its starting position, when desired to do so by the operator, without the necessity of the operator taking hold of the carriage. as is commonly the practice at present.

The operative parts of my invention are contained within the casing 3 which is of compact and convenient size and which is held to the frame of the typewriter through the medium of rivets or other fastening means passing through the lugs 4. Jour- Specification of Letters Patent.

Patented Dec. 11, 191W.

SeriaI No. 187,173.

naled in the opposite walls of the casing is a shaft 6 upon which is journaled a wheel 3 having a circumferential groove 6, and 7 1s a cord fastened at one end in said groove and 111 which the cord is adapted to travel. A pulley 9 is journaled upon a pin and turns 111 an opening in the top of the casing, as shown in Fig. 3 of the drawings and other pulleys 10 and 11 are journaled upon the inverted IL shaped bracket member 28, the pulley 10 being mounted in a plane at right angles to the plane in which the pulley 11 is mounted and agalnst which pulleys the cord travels and the other end of the cord 18 fastened to a finger 8 secured to the frame of the typewriter, as shown clearly in Figs. 1 and 2 of the drawings.

The diameter of the wheel 5 is so adjusted that substantially one revolution of the same w1ll cause the typewriter to be returned from its farthest limit in one direction to its starting point. A pinion 12 is fastened to the wheel 5 by means of the pin 12 and is in mesh with the teeth of the segment gear 13 journaled upon the shaft 14 and said segment gear 13 is provided'with a second series of teeth, designated by numeral 15, and which are in mesh with the teeth 16 formed on the flaring end of the lever 17. Said lever 17 passes through an opening in the casing 3 and is pivotally mounted upon the pin 18 projecting from said casing. Said lever has an aperture in its outer end to receive the shank portion 19 and the wrist rest '18 and an adjusting screw 20 is mounted in a threaded opening in the lever and serves to hold the rest 18 in an adjusted position.

In order to adapt the attachment to typewriters of different heights and sizes the following mechanism may be employed. consisting of the bar 22 which is mounted in the lugs 23 upon the casing, and 26 designates a shell movable upon the bar 22 and carries a set screw 25 adapted to hold the shell in different relative positions upon said bar. The shell is provided with a vertical slot 27 adapted to receive said inverted L-shaped bracket member 28, and an additional set screw 29 is mounted in the casing and engages the bracket member 28 for the purpose of holding the same in different vertical positions. By these two adjustments upon the bar 22, it will be noted that the inverted IL shaped bracket member may be raised or lowered while the shell may have a lateral horizontal adjustment upon the bar.

In the event of it being desired to actuate the lever 17 by tread mechanism, instead of the rest 18, a rod 21 is shown as fastened to the lever near its outer end and which may be attached to any convenient tread (not shown), whereby the lever may be tilted when desired to return the carriage.

In operation, when it is desired to return the carriage to its starting position, whether it has reached its extreme limit in one direction or not, the operator, without taking his or her fingers from the keys of the typewriter, may, by the depression of the wrist upon the rest 18, or through the medium of the tread mechanism, cause the lever 17 to tilt, and which tilting movement, through the gear mechanism shown clearly in Fig. 3 of the drawings, will cause a rotary movement to be imparted to the wheel 5 and to which the cord 7 is fastened in the groove thereof. As the cord is wound upon the wheel 5, the carriage will be returned to its starting position after which the parts will come to rest, after the operator releases the rest or tread device.

By the provision of a simple and efficient device of the nature shown, it will be readilV seen that the device may be attached to different makes of typewriters, through the medium of the adjusting mechanism, or other slight modifications, without in any way departing from the spirit of the invention, the essential features. of which are the means for returning the carriage of the typewriter without the operator removing his or her hands from the keys by simply depressing the wrist or operating the device by -a tread bar.

What I claim to be new is:

1. An apparatus for returning carriages of typewriters, comprising a casing for attachment to the frame of a typewriter, a rotatable wheel mounted therein, a pinion rotating with said Wheel, an oscillating segment gear intermeshing with said pinion, a pivotal lever having gear teeth at one end in engagement with said segment gear, a cord fastened to and winding about said wheel, a pulley and adjustable mounting therefor upon said casing, over which pulley said cord passes.

2. An apparatus for returning carriages of typewriters, comprising a casing adapted to be attached to the frame of a typewriter, a rotatable grooved wheel journaled in said casing, a cord fastened to and winding in the groove of said wheel and adapted to be attached to the typewriter, a pinion rotating with said wheel, an oscillating segment gear having concentric series of teeth, one series engaging the teeth of said pinion, a. pivotal operating lever having teeth upon one end engaging the other series of teeth upon the segment member.

3. An apparatus for returning carriages of typewriters, comprising a casing, a rotatable grooved wheel journaled therein, a pinion rotating with said wheel, a pulley and adjustable mounting therefor, a cord attached to and winding in the groove of said wheel and passing about said pulley, and adapted to be attached to the carriage of a typewriter, an oscillating segment gear having concentric series of teeth thereon, one series engaging said pinion, a pivotal operating lever having teeth at one end engaging the other series of teeth upon the segment member.

4. An apparatus for returning carriages of typewriters, comprising a casing, 21 rotatable grooved wheel journaled therein, a pinion rotating with said wheel, a horizontally mounted bar, a sleeve adjustably held thereon, a vertically adjustable member upon said sleeve, a pulley carried by said member, a cord secured to and winding in the groove of said wheel and passing about said pulley and adapted to be attached to the carriage of a typewriter, an oscillating segment gear having two concentric series of teeth, one series engaging said pinion, and a tilting lever with teeth at one end in mesh with the other series of teeth upon the segment gear.

In testimony whereof I hereunto affix my signature in presence of two witnesses.

JOHN B. DENNIS.

Witnesses:

C. A. ENGLISH, W. H. STEVENS. 

